You have the misfortune to have a car with the metric wheels, long since dumped by car manufacturers. Most owners with metric-wheeled buy a set of imperial wheels on the internet, because metric tyres are very expensive, and also very hard to get hold of.
390mm = 15 1/2 " approx, so no imperial size tyre is going to fit your rims, you need to change the wheels, probably to 16".
By the way which car do you have.